664453546848 has 504 divisors, whose sum is σ = 2427292970928. Its totient is φ = 175233217536.

The previous prime is 664453546847. The next prime is 664453546879. The reversal of 664453546848 is 848645354466.

664453546848 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 5 + 3 + 546 + 84 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664453546847) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 27584986 + ... + 27609062.

It is an arithmetic number, because the mean of its divisors is an integer number (4816057482).

Almost surely, 2^664453546848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664453546848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213646485464).

664453546848 is an abundant number, since it is smaller than the sum of its proper divisors (1762839424080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664453546848 is a wasteful number, since it uses less digits than its factorization.

664453546848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24138 (or 24102 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 63.

The spelling of 664453546848 in words is "six hundred sixty-four billion, four hundred fifty-three million, five hundred forty-six thousand, eight hundred forty-eight".